Buy Polarized and Photochromic Lenses for 20% off
One thing with sunglasses is that they do no totally block out harmful rays coming from the sun. And if you want a pair of sunglasses that do, then you might want to consider building your own. Luckily for you, Zenni optical actually has the solution. They have a wide variety of polarized lenses that would be able to block out harmful light and can be easily adapted to existing sunglasses frames, so it is really easy to make your own pair. They even have photochromic lenses lenses. These are the ones that automatically darken automatically when struck by bright light. They are currently having a 20% off on all Polarized and Photochromic Lenses, so make sure that you order your own.